/*
 * Copyright 2009 Jesse McLaughlin (nzjess@gmail.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.travelfusion.xmlclient.util;

import java.io.InputStream;

/**
 * Defines strategies for locating and loading resources.
 * 
 * @author Jesse McLaughlin (nzjess@gmail.com)
 */
public interface ResourceLoader {

  /**
   * Creates an {@link InputStream} that can used to load an XML command template. This method should return
   * <code>null</code> if the requested resource can be loaded.
   * 
   * @param handlerType The class of the handler requesting the resource.
   * @param requestType The class of the request being handled.
   * 
   * @return An {@link InputStream} from which the required template can be loaded, or <code>null</code> if none
   *         could be found.
   */
  InputStream loadTemplateResourceAsStream(Class<?> handlerType, Class<?> requestType);
}
